How to parse the JSON Date format from the below given json data using jquery?

How to parse the JSON Date format from the below given json data using
jquery?

{
"2013\/02\/05":[
{"id":"84eb13cfed01764d9c401219faa56d53","colour":"#000000","category":"custom"}
],
}
I have used the jquery code given below.I am trying to access the date
'2013/02/05' and the array elements like id ,colour and category of that
date.
$(document).ready(function(){
var output = $("#changeBtn");
$("#data").click(function(){
$.getJSON("json_data.json",function(jd){
var dates = jd.date;
alert(dates);
});
});